id:A032028 - OEIS Search Results

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A032028

Number of rooted planar trees (n+1 nodes) where any 2 subtrees extending from same node are different.

+0
1

1, 1, 1, 2, 4, 9, 23, 62, 167, 461, 1309, 3784, 11018, 32431, 96294, 288246, 868107, 2629499, 8005166, 24482202, 75177313, 231697259, 716488213, 2222381516, 6912569477, 21556270329, 67380727837, 211080434346 (list; graph; listen)

	OFFSET	`1,4`
	LINKS	`C. G. Bower, Transforms (2)` `Index entries for sequences related to rooted trees`
	FORMULA	`"CGK" (necklace, elements, unlabeled) transform of A032027 (shifted right one place).`
	CROSSREFS	`Sequence in context: A027071 A027133 A032010 this_sequence A127384 A058585 A001573` `Adjacent sequences: A032025 A032026 A032027 this_sequence A032029 A032030 A032031`
	KEYWORD	`nonn`
	AUTHOR	`Christian G. Bower (bowerc(AT)usa.net)`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

AT&T Labs Research